vue-cesium
Version:
Vue 3.x components for CesiumJS.
116 lines (114 loc) • 3.41 kB
JavaScript
;
function getFullscreenQuad() {
const GeometryAttributes = Cesium.GeometryAttributes;
const fullscreenQuad = new Cesium.Geometry({
attributes: new GeometryAttributes({
position: new Cesium.GeometryAttribute({
componentDatatype: Cesium.ComponentDatatype.FLOAT,
componentsPerAttribute: 3,
// v3----v2
// | |
// | |
// v0----v1
// prettier-ignore
values: new Float32Array([
-1,
-1,
0,
// v0
1,
-1,
0,
// v1
1,
1,
0,
// v2
-1,
1,
0
// v3
])
}),
st: new Cesium.GeometryAttribute({
componentDatatype: Cesium.ComponentDatatype.FLOAT,
componentsPerAttribute: 2,
values: new Float32Array([0, 0, 1, 0, 1, 1, 0, 1])
})
}),
indices: new Uint32Array([3, 2, 0, 0, 2, 1])
});
return fullscreenQuad;
}
function createTexture(options, typedArray) {
if (Cesium.defined(typedArray)) {
const source = {};
source.arrayBufferView = typedArray;
options.source = source;
}
const texture = new Cesium.Texture(options);
return texture;
}
function createFramebuffer(context, colorTexture, depthTexture) {
const framebuffer = new Cesium.Framebuffer({
context,
colorTextures: [colorTexture],
depthTexture
});
return framebuffer;
}
function createRawRenderState(options) {
const translucent = true;
const closed = false;
const existing = {
viewport: options.viewport,
depthTest: options.depthTest,
depthMask: options.depthMask,
blending: options.blending
};
const rawRenderState = Cesium.Appearance.getDefaultRenderState(translucent, closed, existing);
return rawRenderState;
}
function viewRectangleToLonLatRange(viewRectangle) {
const range = {};
const postiveWest = Cesium.Math.mod(viewRectangle.west, Cesium.Math.TWO_PI);
const postiveEast = Cesium.Math.mod(viewRectangle.east, Cesium.Math.TWO_PI);
const width = viewRectangle.width;
let longitudeMin;
let longitudeMax;
if (width > Cesium.Math.THREE_PI_OVER_TWO) {
longitudeMin = 0;
longitudeMax = Cesium.Math.TWO_PI;
} else {
if (postiveEast - postiveWest < width) {
longitudeMin = postiveWest;
longitudeMax = postiveWest + width;
} else {
longitudeMin = postiveWest;
longitudeMax = postiveEast;
}
}
range.lon = {
min: Cesium.Math.toDegrees(longitudeMin),
max: Cesium.Math.toDegrees(longitudeMax)
};
const south = viewRectangle.south;
const north = viewRectangle.north;
const height = viewRectangle.height;
const extendHeight = height > Cesium.Math.PI / 12 ? height / 2 : 0;
let extendedSouth = Cesium.Math.clampToLatitudeRange(south - extendHeight);
let extendedNorth = Cesium.Math.clampToLatitudeRange(north + extendHeight);
if (extendedSouth < -Cesium.Math.PI_OVER_THREE) {
extendedSouth = -Cesium.Math.PI_OVER_TWO;
}
if (extendedNorth > Cesium.Math.PI_OVER_THREE) {
extendedNorth = Cesium.Math.PI_OVER_TWO;
}
range.lat = {
min: Cesium.Math.toDegrees(extendedSouth),
max: Cesium.Math.toDegrees(extendedNorth)
};
return range;
}
export { createFramebuffer, createRawRenderState, createTexture, getFullscreenQuad, viewRectangleToLonLatRange };
//# sourceMappingURL=util.mjs.map